Filter.



WITH/esp e5:

W. B. KLEIN.

FILTER.

APPLIoATIon vHmm un. 20,1903.

902,971. Patented Nov.3,19os.

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m um I/ 9 vnr Nonm Pn'sus ca.. WASHINGTON, nv c UNITED STATES PATENTOFFICE.

WILLIAM B. KLEIN, OF CHICAGO, ILLINOIS.

FILTER.

To all whom it may concern:

Be it known that I, VILLIAM B. KLEIN, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Filters, of which thefollowing is a specification.

This invention relates more particularly to filter plates for use infilters of the general style shown in Patent No. 816,479, issued to meMarch 27, 1906; although the filter plates may be otherwise employed.

In numerous rior constructions of the general style of lters inquestion, the filter plates have been so constructed and arranged thatthe pressure of the entering li uid tends to separate the filter body orpac ring into layers and force the layers apart, thereby creating seamsor openinvs through which the unfiltered liquid tends to fiow ratherthan through the filter medium itself, so that the filtration isrendered imperfect.

The object of the present invention is to so construct and arrange thefilter plates that the pressure of the admitted liquid will serve tohold the filter body or packing tightly compressed against the plates,thus aV Ording tight joints which will prevent the formation of seamsand the passage of the liquid save only through the mass of the filterbody. The plates are so constructed and arranged that the greater thepressure of the admitted liquid the tighter will be the joint betweenthe lateand the packing.

The invention urther contemplates the use of filter plates of a uniformsize and style rather than of alternate sizes as have been frequentlyused in certain prior constructions, thereby simplifying the resultantconstruction.

The invention consists of the features of construction and combinationof parts hereinafter described and claimed.

In the drawings, Figure l is a lon itudinal sectional elevation of afilter o the eneral style shown in my patent above reerred to, showingthe filter lates of the resent invention in cross section; Fig. 2 a aceview of one of the filter plates; and Fig. 3 an ed e elevation thereof.

It is not eemed necessary to describe in detail the general structure ofthe filter itself since devices of this kind are well understood. Asshown, the filtering plates of the present invention are applied to aSpecification of Letters Patent.

Application filed April 20, 1908.

Patented Nov. 3, 1908.

Serial No. 428,280.

double-ended filter, comprising a cylindrical shell 4 divided into twosections by means of a cross partition 5 having formed therein suitableinlet and outlet passages. It is not intended, however, to limit thepresent invention to a filter of the double variety herein referred to,nor to an arrangement of inlet and outlet passages of any particularformation. The filtering packing or material 6 is located within anannular space formed between an outer cylindrical f0- raminous wall 7and an inner foraminous tubular column 8. The packing is locatedintermediate a plurality of ring shaped filter plates 9, the outer edgesof which abut against the shell 7 and the inner edges of which abutagainst the column 8. Each of the filter plates is provided, around itsperiphery, with a plurality of annular wedge shaped ribs or ridges 10,and around its inner edge with a plurality of similar inner ribs orridges 11. The plates are further provided, on both sides, with layersof screening or similar mesh material 12 against which the packingdirectly rests. The screening sections are of ring formation and of asize to rest upon the flat upper and lower surfaces of the platesintermediate the rings or ridges thereof and the foraminous inner andouter walls of the packing chamber.

The outermost filterin plate 13 differs slightly from the inner p atepreviously described, in that, instead of being of ring shape formationand provided with inner ribs or ridges, it is of circular shape andprovided, in its center, with perforations 14 which overlie the outerend of the tubular column 8. The plate, however, is provided, around itsperiphery, with ribs or ridges 15 similar to the ribs or ridgespreviously described. The plate 13 is further provided, in its center,with a depending tubular perforated sleeve 16 which telescopes into theend of the tubular column 8 and forms, in effect, a continuationthereof. The filtering chamber is closed at the end by means of a solidor unbroken end plate 17 adapted to be compressed in any suitablemanner. The outer filtering plate 13 and the end plate 17 are bothprovided with layers of screening or mesh material similar to the layerspreviously referred to. The partition wall in the form shown, islikewise provided with circumferential ribs or ridges 18 and a layer ofscreening 19, the partition being perforated in its center to receive abushing 20.

The filter, in the form shown, is of a double chamber variety adaptedfor double or tandem filtration, but it will be understood that thepresent invention is not intended to be limited in any way to a filterof this particular character, so that thc spe* cific construction of thepartition wall may be changed or the filter plates supplied to a singlechambered lter without any substantial modification.

It Will be noted that the circumferential ribs or ridges and the innerribs or ridges are located on opposite faces of the plates and that theplates are so arranged that all of the circumferential ribs or ridgeswill extend in one direction and all of the inner ribs or ridges willextend in the opposite direction and that said ribs or ridges will liein close contact with the outer and inner foraminous walls of thefiltering chamber.

In use the unfiltered liquid admitted to the filtering chamber willenter under pressure through the holes or perforations in the outercylindrical wall and will flow into the meshes of the layers ofscreening, which are in contact with the perforated cylindrical Wall onthat side of the filtering plates only which are unbroken bycircumferential ribs or ridges. The liquid thus admitted, being underpressure, will exert a pressure on the adjacent layer of packing,thereby tending to force or embed the packing between the ribs or ridgesof the next adjacent plate, so that a. tight joint will be maintalnedbetween the ribs of the plate and the packing. The liquid thus admittedwill travel through the meshes of the sections of screening until it isbrought up to the inner ribs or ridges and thereafter Will be forcedthrough the packing to the next adjacent layer of screening Whichoverlies the smooth inner face of the next adjacent filtering plate,which latter layer of screening Will convey the liquid to the point ofdischarge into the perforated tubular column 8. In similar manner thepacking is held embedded within the inner ribs or ridges so that noseams or o enings Will be afforded for the escape o liquid prior to itsfiltration. After the liquid has 'passed through the filter body fromone layer of screening to the next adjacent layer, it will exert a comression on the opposite side of the layer o packing, and the pressureVso exerted Will thus force the packing into the spaces between theinner ribs or ridges.

In View of the fact that all of the filtering plates are of uniform sizeand extend completely across the filtering chamber, and, in View of thearrangement of the inner and outer ribs or ridges, it is clear that itWill be impossible for the liquid under pressure to divide the packinginto additional layers by the formation therethrough of seams oropenings so that the packing body will maintain its proper compressionand the filtering action Will continue regardless of the resistance dueto clogging in the filter.

What I claim as new and desire to secure by Letters Patent is:

I1. In a filter of the class described, a plurality of plates providedwith ribs or ridges near their circumference on one side only, a packingbody between the plates, and a foraminous outer shell surrounding theplates and adapted to admit liquid to the packing body at a point toexert a compression there on tending to embed said packing in the ribsor ridges of the next adjacent plate, sul stantially as described.

2. In a filter of the class described, a plurality of plates providedwith ribs or ridges near their circumference on one side only, a packingbody between the plates, a foraminous outer shell surrounding the platesand adapted to admit liquid to the packing body at a point to exert acompression thereon tending to embed said packing in the ribs or ridgesof the next adjacent plate, inner ribs or ridges formed only on theopposite faces of the plates, and a foraminons inner column inside thepacking body, substantially as described.

3. In a filter of the class described, the combination of a plurality offilter plates provided around their peripheries with ribs or ridges 011one side only and provided near their centers with inner ribs or ridgeson the other side only, layers of screening lying adjacent the unbrokenportions of the plates on opposite sides thereof, layers of packingintermediate the screens, a foraminous shell surrounding the plates andabuttin against the ribs or ridges and against the ayers of screening onthe sides opposite such ribs or ridges, and a foraminous inner columninside the packing body and abutting against the inner ribs or ridgesand against the layers of screening on the sides of the plates oppositethereto, substantially as described.

4. In a filter of the class described, the combination of a plurality offilter plates provided around their perlpheries with ribs or ridges onone side only and provided near their centers with inner ribs or ridgeson the other side only, layers of screening lying adjacent the unbrokenportions of the plates on opposite sides thereof, layers of packinintermediate the screens, a foraminous Shel surrounding the plates andabuttin against the ribs or ridges and against the Iayers of screeningon the sides opposite such ribs er rid es, a forarninous inner columninside the pac ring body and abutting against the inner ribs or ridgesand against the layers of screening on the sides of the plates op ositethereto, and an end lter plate providetfwith layers of screening andprovided with crcumferential ribs or ridges only, and further providedwith holes or perforations overlying the tubular Center column,Subetai/itiflllyV als described.

5. A filter plate having in its renter un opening Surrounded by innerribs or ridges on one side only, und having around its outer edge ribsor ridges on its` other sido only, substantially as described.

G. In a filter, a filter pleite having therein an opening surrounded byinner ribs or ridges on 011e side only and having on its opdgeil tlieplatte unbroken by ribs or ridges .lo its center, :und :i layer ofscreening of 2L Isize to overlle the Smooth eur'lnro ol that Side of theplete unbroken by outer ribs or ridges, 20

substantially :x5 deeoribed.

VJILLTAM B. KLEIN'.

Witnesses Kunnen BA'NMNG, Timun P. BOND.

